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>I try to debug my GTK+ application with gdb, but it
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Idea? [GTK 2.x]</TITLE
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>I try to debug my GTK+ application with gdb, but it
hangs my X server when I hit some breakpoint. Any
Idea? <I
CLASS="EMPHASIS"
>[GTK 2.x]</I
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>From Federico Mena Quintero:</P
><P
><SPAN
CLASS="QUOTE"
>"X is not locked up.  It is likely that you are hitting a
breakpoint inside a callback that is called from a place in Gtk that has
a mouse grab."</SPAN
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><P
><SPAN
CLASS="QUOTE"
>"Run your program with the <TT
CLASS="LITERAL"
>--sync</TT
>
option; it will make it easier to debug. Also, you may want to
use the console for running the debugger, and just let the
program run in another console with the X server."</SPAN
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><P
>Eric Mouw had another solution:</P
><P
><SPAN
CLASS="QUOTE"
>"An old terminal connected to an otherwise unused serial
port is also great for debugging X programs. Old vt100/vt220
terminals are dirt cheap but a bit hard to get (here in The
Netherlands, YMMV)."</SPAN
></P
><P
>Another option is to run your application on Xnest. Xnest is an X server
which displays its root window in a regular window of another X server.  
A pointer grab on the Xnest display will not affect the GUI of your debugger
running on your regular X server.
<TABLE
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>Xnest :1
twm -display :1
myapp --display=:1</PRE
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